BIO 1140 Lecture Notes - Lecture 2: Alpha Helix, Histidine, Sickle-Cell Disease

• School: University of Ottawa
• Department: Biology
• Course: BIO 1140
• Professor: Caroline Petit- Turcotte

Document Summary

In learning objectives highlighted sections are important, those are ones that people tend to struggle with! *structure, how it affects where the macromolecule can reside in the cell, and how it influences its function. Carbohydrates are water-soluble, the plasma membrane is liposoluble, so carbohydrates cannot be imbedded in the membrane because it won"t be happy there unless it"s attached to something, therefore carbohydrates do not contribute to membrane fluidity. Carbohydrates are however involved in cellular recognitions and communication, providing a source of chemical energy, and structural aspects of outer membrane. A: the difference in electronegativity between c and h is relatively low, uneven distribution of charge is what creates polarity. Here, charge is distributed relatively evenly, so the bonds will be nonpolar covalent bonds. Lone pair of electrons on nitrogen, so a more negative area than the rest of the molecule, contributing to the electronegativity and polarity. *know which are the relevant atoms that contribute to electronegativity/polarity in biology n,